It appears that a lot of people have upgraded their Lenovo x220 tablets from Windows 7 to the Windows 8 consumer Preview and have found their touch interactions or pen inputs are not working correctly. Here’s are possible solutions.
Firstly, I hope and pray that you’ve done this installation on a spare machine and not your everyday machine and the following is just a suggestion which seems logical to me, so take the advise with a pinch of salt and do this at your own risk, don’t blame me if things mess up further, wish you the best of luck.
Go to add/remove programs and uninstall the Wacom ISD tablet driver and then restart the windows 8 consumer preview. Logically Windows should then re-install the appropriate drivers.
You can try two other approaches,
1. Try an update for each touch device driver or
2. Remove touch device drivers
1. Try and update each touch device driver, by going to each of the devices in your device manager highlighted in the second image below(scroll down), both the red and yellow box, and update the drivers by right clicking and choosing update driver software.
2. Remove the earlier WACOM drivers which are installed on your x220t.
Go to Device manager and remove the following devices which are in the red outlined box below. Next examine each of the HID
Then click on each of the HID devices in the yellow box. If you see any which has a WACOM driver installed against it, remove it.
Once you’ve done the above, re-start your machine and pray Windows 8 Consumer Preview should logically automatically download and install new touch drivers.
Let me know how this works for you. Best of luck.